Find Percent, Part, and Whole Pg 2

Front

What is a percent?

Back

A percent is a way to express a number as a fraction of 100. It is often used to compare ratios.

Front

How do you find the percent of a number?

Back

To find the percent of a number, multiply the number by the percent (as a decimal). For example, to find 25% of 60, calculate 60 x 0.25 = 15.

Front

What is the formula to find the whole when given a part and a percent?

Back

Whole = Part / (Percent as a decimal). For example, if 15 is 25% of a whole, then Whole = 15 / 0.25 = 60.

Front

If Michelle missed 6 questions out of 25, how do you calculate the percent she missed?

Back

Percent missed = (Questions missed / Total questions) x 100 = (6 / 25) x 100 = 24%.

Front

If 80% of patients had a cavity and 20 patients had a cavity, how do you find the total number of patients?

Back

Total patients = Patients with cavity / (Percent with cavity as a decimal) = 20 / 0.80 = 25.

Front

What is the relationship between part, whole, and percent?

Back

The relationship is defined by the formula: Percent = (Part / Whole) x 100.

Front

How do you calculate a tip based on a percentage?

Back

To calculate a tip, multiply the total bill by the tip percentage (as a decimal). For example, for a $48 bill and a 15% tip, calculate 48 x 0.15 = $7.20.

Front

What does it mean to find the part when given the whole and the percent?

Back

Finding the part means calculating how much of the whole corresponds to the given percent. Use the formula: Part = Whole x (Percent as a decimal).

Front

If Zack bought a bag of candy and 25% was chocolate, how do you find the number of chocolate pieces?

Back

Number of chocolate pieces = Total pieces x (Percent of chocolate as a decimal) = 60 x 0.25 = 15.

Front

What is the formula to convert a fraction to a percent?

Back

To convert a fraction to a percent, divide the numerator by the denominator and multiply by 100.